【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《五年级数学计算题20道及答案大全》,欢迎阅读!
五年级数学计算题20道及答案大全
(1)2.5*32*0.125
=(2.5*4)*(8*0.125) =10*1 =10
(2)3.5-7+6.5 =3.5+6.5-7 =3
(3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25
(4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10
(5)12.5×7.4×0.8 =12.5×0.8×7.4 =74
(6)6.5×9.5+6.5×0.5 =6.5×(9.5+0.5) =6.5×10 =65
(7)0.35×1.6+0.35×3.4 =0.35*(1.6+3.4) =0.35*5 =1.75
(8)6.72-3.28-1.72 =6.75-(3.28+1.72) =6.75-5 =1.75
(9)0.45+6.37+4.55 =0.45+4.55+6.37 =5+6.37 =11.37
(10)28×12.5-12.5×20 =(28-20)*12.5 =8*12.5 =100
(11)23.65-(3.07+3.65) =23.65-3.65-3.07 =20-3.07 =16.93
(12)(4+0.4×0.25)8×7×1.25 =(4+1)*7*10
=5*7*10 =350
(13)1.65×99+1.65 =1.65*(99+1) =1.65*100 =165
(14)27.85-(7.85+3.4) =27.85-7.85+3.4 =20+3.4 =23.4
(15)48×1.25+50×1.25×0.2×8 7.8×9.9+0.78 =7.8*(9.9+0.1) =7.8*10 =78
(16)4.8×46+4.8×54 =(46+54)*4.8 =100*4.8 =480
(17)673-327-173 =673-(327+173) =673-500 =173
(18)4.44*2.5 =1.11*(4*2.5) =1.11*10 =11.1
(19)3.5÷1.4
=(3.5÷0.7)÷(1.4÷0.7) =5÷2 =2.5
(20)1+2+3+4+5.+99+100
=(1+99)+(2+98)+(3+97)+.+(49+51)+50 =(100÷2-1)*100+50 =4900+50 =4950
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