计算练习一 1.直接写出得数
239154105378+199= 12×5= + = ÷ = × + × =
34103127712511334+ = 9.97+0.3= 5- - = 1÷
×5= 1.25×3×8= 47752.计算
4108313χ- χ= 300-288÷12×5 ×[( - )÷ ]
92715425
计算练习二 1.直接写出得数
51488-199= 4.8÷12= 4.45+7.6+2.55 = - = 843154357357 ÷ = 1- + = × = × + × = 42991061244122.计算 3327159167 ︰χ= ︰ ÷9+ × ÷[ ×( - )]
48312912102510
计算练习三 1.直接写出得数
2212124×5= 0.36÷12= 1÷ ×5= ( + )×12= + = 5343221435578-299 = ÷ = 1.25×11×8= ×10= - = 3185482.计算
53321x∶42= ∶10 430―3684÷12+93 ×[( - )÷ ] 410347
计算练习四 1.直接写出得数
343.6÷12= 860-298= 8- - = 2.5×1.2= 1÷0.5×2=
77123112.5-1.65= ( + )×15= ×15= ÷ = 2.5×17×0.4=
355422.计算
3227χ+ χ=16 6. 5×(2.4-1. 6)-1.2 ÷[ -(1- )] 515510
计算练习五 1.直接写出得数
2561.25÷0.5= ×12= 1- + = 25×4= 2÷1%= 31111191
3
4― = ÷ = 560÷0.2=
5÷8= 348+199= 41032.计算
0.3611251 = 4260÷15-12×4.25 [ -( + )]÷
χ7125122
计算练习六 1.直接写出得数
1115×8= 576―299= 0.2= 12×( + )= 1.25×32×2.5 = 348572723 ― = ― + ― = 4.45―1.75―1.45= 7÷1.4= ×15= 96858552.计算
2
527339163χ- χ=20 + × ÷ ÷ ×[( ― )]
99972102510
计算练习七 1.直接写出得数
11727215×6= 360÷1.2= 12÷( + )= 0.3= × ÷ × =
2
348585323545×0.99= 4.45―1.75―1.25= 2×10%= 1― + = 5÷ × = 55532.计算
327521+)= 7.5-(3.28+2.15) 2-( + )÷ χ×(
9362434
计算练习八 1.直接写出得数
770.3+19×0.3 = 44×2.5 = 24×4= 3.6÷0.12= 7÷ ― ÷7= 883235389-298= 1― ― = 5× ÷ = 0.4= 560÷16÷5= 55532.计算
2
11121 4χ÷ =4 3684÷12+43 ÷[(+)×] 355313
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