一、口算:
4.3-2.5= 0.17+0.06= 1.02-0.09= 720÷800= 0.17+0.6= 0.83-0.6= 17×300= 0.98-0.09= 0.2+0.78= 0.6×0.7= 10.2+0.02= 0.15+0.7= 6.7+2.5= 10.2+0.2= 9.2-6.1= 3.2-3.2= 3.7+2.3= 2.5×100= 二、用竖式计算下列各题(除不尽的保留三位小数)
31.5×24.5 0.8×0.56 4.23×0.028 0.63
34.3÷0.23 36×0.56 0.32÷0.2 6.728
3.45×84 4.6×25 0.41×56 1.05
0.076×24 2.3÷5.5 8.63×0.42 8.63
8.5÷5= 3.12-0.32= ×1.05 ÷3.2 ×305 ÷0.42 0.38×2.6 1.24÷1.5 3.2×1.8 0.32÷0.9
214×0.37 2.6×25 1.06×30 0.156×15 =
二、脱式计算(能简算的要简算)
0.125×0.25×8×4 7.4×0.28+0.28×2.6
(4-0.4)×2.5 2.5 ×( 0.77 × 0.4) 6.1
(4+0.4)×2.5 8×7×0.125
3.9×9.9+0.39 4.5×1.2+2.3
9.4×6.1×2.3 3.25×4.76-7.8 18.14.8×0.9+0.48 ×3.6+3.9×3.6 10-2.3×1.2 0.4+1.25)×0.8 ×0.92+3.93
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