直接写得数
300×2= |
2100×4= |
102×3= |
60×8= |
50×4+120= |
24×3= |
70×6= |
0×270= |
253+10×4= |
200×5﹣900= |
用简便方法计算.
①23.4×16﹣23.4×6 ②20﹣5.75﹣14.25 ③1.25×0.25×32 ④56×(
﹣
+
)
用递等式计算(能简算的请简算).
①646+136÷17×25②44×(﹣
) ③7.5×46.7+52.3×7.5+7.5
④(2﹣×
)÷
⑤
÷15+
×
⑥[(
﹣
)×
]÷
.
直接写出下面各题的结果.
24÷0.8=3.82﹣1.80=2.6÷20%=6.28×0.5= 10﹣2÷7=
408×10%=8.4÷3=2.02+0.4= 2.8÷0.1=5.4+8=
1÷0.2×1÷0.2=0.125×2.5×8= 1÷×
=2﹣
﹣
=1÷
×
=
×
÷
×
=
用合理的方式计算.
2.5×0.125×32×[1÷(
﹣
)]
×67+
×2+
9﹣1.72﹣3.28+5.5.
下面各题怎样简便怎样算.
6.13+28.86+13.87+1.1412×97+1.2×3071÷60﹣68×
8.8×(3.75﹣1.25)×1.25(+
)÷
(
﹣
)×9×41.