口算 1.2+2.8= 0.9÷0.01= 3.5+7.6= 3×0.2×0.5= 0.96÷0.3= 1.5×0.4= 7÷0.25= 2.5×0.7×0.8= 8
口算1.2+2.8=0.9÷0.01=3.5+7.6=3×0.2×0.5=0.96÷0.3=1.5×0.4=7÷0.25=2.5×0.7×0.8=8-2.5=16÷1.6...
口算 1.2+2.8= 0.9÷0.01= 3.5+7.6= 3×0.2×0.5= 0.96÷0.3= 1.5×0.4= 7÷0.25= 2.5×0.7×0.8= 8-2.5= 16÷1.6= 5.6×1.01= 8×（2.5+0.25）= 0.36+0.64= 64.32÷16= 72.8÷0.8= 8.4×0.2= 8.4÷4.2= 0.05×0.8= 2.56-0.37= 1.25×0.8×0.5=
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解答：
| 解：1.2+2.8=4 | 0.9÷0.01=90 | 3.5+7.6=11.1 | 3×0.2×0.5=0.3 | 0.96÷0.3=3.2 |
| 1.5×0.4=0.6 | 7÷0.25=28 | 2.5×0.7×0.8=1.4 | 8-2.5=5.5 | 16÷1.6=10 |
| 5.6×1.01=5.656 | 8×（2.5+0.25）=22 | 0.36+0.64=1 | 64.32÷16=4.02 | 72.8÷0.8=91 |
| 8.4×0.2=1.68 | 8.4÷4.2=2 | 0.05×0.8=0.04 | 2.56-0.37=2.19 | 1.25×0.8×0.5=0.5 |
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