问题
解答题
脱式计算. ①
②
③25%×32×0.125 ④(37.5%+
|
答案
①
×7 13
+3 4
×3 4
,6 13
=(
+7 13
)×6 13
,3 4
=1×
,3 4
=
;3 4
②
÷3 7
+7 11
÷4 7
,7 11
=
×3 7
+11 7
×4 7
,11 7
=(
+3 7
)×4 7
,11 7
=1×
,11 7
=
;11 7
③25%×32×0.125,
=0.25×4×8×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;
④(37.5%+
-25%)×24,5 6
=(
+3 8
-5 6
)×24,1 4
=
×24+3 8
×24-5 6
×24,,1 4
=9+10-6,
=19-6,
=13.