第1章 小數(shù)乘法 題型專練（計(jì)算題）-2024-2025學(xué)年數(shù)學(xué)人教版5年級(jí)上冊(cè)（含答案解析）

第=page1313頁(yè)，共=sectionpages1313頁(yè)2024-2025學(xué)年上學(xué)期六年級(jí)數(shù)學(xué)第1章小數(shù)乘法題型專練-計(jì)算題一、計(jì)算題1．口算。2.1×10＝

0.2×0.4＝

0.4×0.25＝

0.8×50＝0.8×0.6＝

3×0.9＝

0.12×0.6＝

0.4×0.08＝0.6×1.4＝

2.4×0.5＝

2.3×4＝0.07×100＝

0.5×3.6＝

11×0.5＝

3.5×4＝

2.5×2＝

16×0.5＝

0.125×0.8＝0.06×0.8＝

1.3×0.07＝

0.31＋0.69＝

9－5.3－0.7＝2．直接寫出得數(shù)。

0.3×9＝

0.3×0.5＝

1.2×3＝

3.2×30＝0.8×4＝

4.2×2＝

1.9×0.3＝

1.2×0.06＝2.5×3.8×0.4＝

0.67×101－0.67＝0.02×4＝

1.1×20＝

12×0.4＝

4×0.7＝2.2×3＝

0.7×0.6＝

1.3×3＝

0.5×0.5＝0.8×4＝

2.5×100＝

0.06×7＝

1.5×3＝

0.5×100＝

1.3×5＝

4.2×3＝

0.7×0.8＝3．用豎式計(jì)算，帶*的要求驗(yàn)算。6.15×4.8＝

3.06×0.4≈

（得數(shù)精確到十分位）0.056×0.15＝9.8＋11.02＝5.04×28＝4.6×8＝

0.25×64＝0.85×28＝

2.07×12＝

（保留一位小數(shù)）6.4×0.25＝

9.8×1.03＝

7.6×4.3＝0.63×2.4＝

0.38×1.5≈（得數(shù)保留一位小數(shù)）

*24×0.15＝4．脫式計(jì)算，能簡(jiǎn)便就簡(jiǎn)便計(jì)算。8.42×5.6＋5.6×1.58

42.5×0.125×0.8

28.1×99＋28.116.8－6.8×0.15

4.66×0.28＋4.66×0.72

0.87×0.5×46.5×9.9＋0.65

32×1.25×0.251.25×0.16×2.5

5.9×10.12.5×（3.5＋3.5＋3.5＋3.5）

55×1.37＋6.3×5.55.64×3.6＋6.4×5.64

0.75×10.12.5×4×0.8×12.5

10.1×99－9.90.58×0.5×0.6

3.91×101

0.46×5.2＋0.54×5.21.25×32×0.25

1.25×（0.8＋8）0.125×2.5×16

1.58×99＋1.58（1.25＋12.5＋125）×8

4.86×9.7＋0.486×378×99

21.5×3.8＋21.5×6.2960÷（12＋540÷15）

125×32×2513.26＋5.33＋4.67＋6.74

50－23.82－7.182400－[（720－685）×13]

17.28－0.63＋4.37

（37＋37＋37＋37）×256.3＋2.82＋3.7＋1.18

14.2×2.38＋1.42×76.2

67×1010.8×62.3×12.5

99×7.4＋7.4

0.64×45＋3.6×4.5

參考答案1．21；0.08；0.1；40；0.48；2.7；0.072；0.0320.84；1.2；9.2；7；1.8；5.550；8.7；6.55；60；0.512；0.0794；8.7；152.514；5；8；0.1；0.048；0.091；1；32．0.92；10；0.72；1048；0.8；6；0.06420；602.7；0.15；3.6；963.2；8.4；0.57；0.0723.8；670.08；22；4.8；2.86.6；0.42；3.9；0.253.2；250；0.42；4.5；50；6.5；12.6；0.563．6.15×4.8＝29.52

3.06×0.4≈1.2

0.056×0.15＝0.0084

9.8＋11.02＝20.82

5.04×28＝141.12

4.6×8＝36.8

0.25×64＝16

0.85×28＝23.8

2.07×12＝24.84

6.4×0.25＝1.6

9.8×1.03＝10.094

7.6×4.3＝32.68

0.63×2.4＝1.512

0.38×1.5≈0.6

24×0.15＝3.6

驗(yàn)算：4．8.42×5.6＋5.6×1.58＝5.6×（8.42＋1.58）＝5.6×10＝5642.5×0.125×0.8

＝42.5×（0.125×0.8）＝42.5×0.1＝4.2528.1×99＋28.1＝28.1×（99＋1）＝28.1×100＝281016.8－6.8×0.15＝16.8－1.02＝15.784.66×0.28＋4.66×0.72＝4.66×（0.28＋0.72）＝4.66×1＝4.660.87×0.5×4＝0.87×（0.5×4）＝0.87×2＝1.746.5×9.9＋0.65＝6.5×9.9＋6.5×0.1＝6.5×（9.9＋0.1）＝6.5×10＝6532×1.25×0.25＝（8×4）×1.25×0.25＝（8×1.25）×（4×0.25）＝10×1＝101.25×0.16×2.5＝1.25×0.8×0.2×2.5＝（1.25×0.8）×（0.2×2.5）＝1×0.5＝0.55.9×10.1＝5.9×（10＋0.1）＝5.9×10＋5.9×0.1＝59＋0.59＝59.592.5×（3.5＋3.5＋3.5＋3.5）＝2.5×3.5×4＝2.5×4×3.5＝10×3.5＝355.5×1.37＋6.3×5.5＝5.5×（1.37＋6.3）＝5.5×7.67＝42.1855.64×3.6＋6.4×5.64＝5.64×（3.6＋6.4）＝5.64×10＝56.40.75×10.1＝0.75×（10＋0.1）＝0.75×10＋0.75×0.1＝7.5＋0.075＝7.5752.5×4×0.8×12.5＝（2.5×4）×（0.8×12.5）＝10×10＝10010.1×99－9.9＝10.1×99－99×0.1＝（10.1－0.1）×99＝10×99＝9900.58×0.5×0.6

＝0.58×（0.5×0.6）＝0.58×0.3＝0.1743.91×101＝3.91×（100＋1）＝3.91×100＋3.91×1＝391＋3.91＝394.910.46×5.2＋0.54×5.2＝（0.46＋0.54）×5.2＝1×5.2＝5.21.25×32×0.25＝1.25×（8×4）×0.25＝（1.25×8）×（4×0.25）＝10×1＝101.25×（0.8＋8）＝1.25×0.8＋1.25×8＝1＋10＝110.125×2.5×16＝0.125×2.5×4×4＝0.125×4×2.5×4＝（0.125×4）×（2.5×4）＝0.5×10＝51.58×99＋1.58＝1.58×（99＋1）＝1.58×100＝158（1.25＋12.5＋125）×8＝1.25×8＋12.5×8＋125×8＝10＋100＋1000＝110＋1000＝11104.86×9.7＋0.486×3＝0.486×97＋0.486×3＝0.486×（97＋3）＝0.486×100＝48.678×99＝78×（100－1）＝78×100－78×1＝7800－78＝772221.5×3.8＋21.5×6.2＝21.5×（3.8＋6.2）＝21.5×10＝215960÷（12＋540÷15）＝960÷（12＋36）＝960÷48＝20125×32×25＝125×（8×4）×25＝（125×8）×（4×25）＝1000×100＝10000013.26＋5.33＋4.67＋6.74＝（13.26＋6.74）＋（5.33＋4.67）＝20＋10＝3050－23.82－7.18＝50－（23.82＋7.18）＝50－31＝192400－[（720－685）×13]＝2400－[35×13]＝2400－455＝194517.28－0.63＋4.37＝16.65＋4.37＝21.02

（37＋37＋37＋37）×25＝（37×4）×25＝37×（4×25）＝37×100＝37006.3＋2.82＋3.7＋1.18＝6.3＋3.7＋2.82＋1.18＝（6.3＋3.7）＋（2.82＋1.18）＝10＋4＝14

14.2×2.38＋1.42×76.2＝