问题
解答题
能简算的要简算 2.9÷8+1.1×
(
(
|
答案
(1)2.9÷8+1.1×
,1 8
=(2.9+1.1)×
,1 8
=4×
,1 8
=
;1 2
(2)
×8×13 5
×1.25,8 13
=(
×13 5
)×(8×1.25),8 13
=1.6×10,
=16;
(3)(
+1 4
)×28,5 7
=
×28+1 4
×28,5 7
=7+20,
=27;
(4)(
÷3-3 4
)×1 10
,1 3
=(
×3 4
-1 3
)×1 10
,1 3
=
×3 20
,1 3
=
.1 20