= | = | = | = | = |
= | = | = | = | = |
解: =2.24, | 0.48× =0.3, | = , | = , | = , |
= , | =10, | =1, | =16, | =27 . |
分析:把2
-0.76+
改写成2
+
-0.76,从而简算;把1.5-(1
-
)改写成1.5-1.5+
,从而简算;1.25×
×0.8,运用乘法交换和结合律简算;36×(
-
),运用乘法分配律简算;把27
和3
×4中的除法分别改写成乘法进而计算;其它按照运算方法计算得解.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
=
=
=
=
=
=
=
=
=
=
=0.3,
,
,
.