口算。
120÷6= 30×10= 3000÷5= 300÷3= 69÷3=
2000÷4= 550÷5= 15×6= 53×20= 700×60=
134÷7≈ 92×78≈ 42×39≈ 570÷8≈
相关试题
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+怎样算简便就怎样算．
| 6.24÷4+3.76×0.25 |
16.2×9.9+1.62 |
7.75×[20÷（3.24﹣3.04）] |
| 788÷12.5÷0.8 |
276.4×11﹣276.4 |
25×（4.7+4.7+4.7+4.7） |
直接写得数．
3.52+0.8=
4×0.25=
1﹣0.09=
7.2÷3=
4.3÷0.1=
11.7+1.6﹣11.7+1.6=
2.14×0.3÷2.14×0.3=
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