×8= | ÷2= | ÷ = | × = | × = |
1÷ = | ÷60%= | ×15= | - = | 6.8÷10%= |
4.5+ = | × = | ×2= | ÷ = | + = |
4×( + )= | 1÷37.5%= | 5÷5÷ = | 32-32× = | ( - )×20= |
×8=6, | ÷2= , | ÷ = , | × = , | × = , |
1÷ = , | ÷60%= , | ×15= , | - = , | 6.8÷10%=68, |
4.5+ =5, | × = , | ×2= , | ÷ =2, | + = , |
4×( + )=1 , | 1÷37.5%= , | 5÷5÷ =5, | 32-32× =28, | ( - )×20=1. |
分析:
×8,
×
,
×
,
×15,
×
,计算时注意约分;4×(
+
),(
-
)×20,利用乘法的分配律计算简便;其它按运算顺序计算.
点评:本题考查了基本的运算,注意分析数据,选择合适的方法计算.
÷
=
=
÷60%=
-
×2=
÷
=
+
=
,
,
,
,
,
,
,
,