| 6+17= | 156-156= | 4500÷9= | 41+18= | 3600÷30= |
| 57+43= | 48÷12= | 1.8+3.5= | 7-3.8= | 35×60= |
| 35×10= | 1500÷10= | 0÷46.79= | 1.5÷5= | 8÷5= |
+ = | + = | 1- = | ![]() ![]() | - = |
3- = | ×2= | × = | ÷ = | 40×80= |
| 80-17 | 32×20 | 75-69= | 13×5= | 8.7-2.4= |
| 2000+400= | 1.4×100= | 1.2÷100= | 124.6×1= | 7.256÷7.256= |
| 1.2÷0.2= | 24×10%= | +0.5= | 2+ = | + = |
÷2= | ÷ = | ×0.2= |
| 6+17=23, | 156-156=0, | 4500÷9=500, | 41+18=59, | 3600÷30=120, |
| 57+43=100, | 48÷12=4, | 1.8+3.5=5.3, | 7-3.8=3.2, | 35×60=2100, |
| 35×10=350, | 1500÷10=150, | 0÷46.79=0, | 1.5÷5=0.3, | 8÷5=1.6, |
+ = , | + =1, | 1- =0.1, | ![]() = , | - = , |
3- =2.6, | ×2= , | × =0.2, | ÷ = , | 40×80=3200, |
| 80-17=63, | 32×20=640, | 75-69=6, | 13×5=65, | 8.7-2.4=6.3, |
| 2000+400=2400, | 1.4×100=140, | 1.2÷100=0.012, | 124.6×1=124.6, | 7.256÷7.256=1, |
| 1.2÷0.2=6, | 24×10%=2.4, | +0.5= , | 2+ =2.25, | + = , |
÷2= , | ÷ =1, | ×0.2= . |
分析:根据整数、小数、分数和百分数加减乘除的计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算.
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