计算,能简算的要简算
|
(1)1.2-0.5×1.8÷0.9,
=1.2-0.5×(1.8÷0.9),
=1.2-0.5×2,
=1.2-1,
=0.2;
(2)8×7×1.25,
=(8×1.25)×7,
=10×7,
=70;
(3)
×5 16
×3+11 19
×27 19
,15 16
=(
×3)×5 16
+11 19
×27 19
,15 16
=(
+11 19
)×27 19
,15 16
=2×
,15 16
=
;15 8
(4)(
-3 8
÷3 8
)×8 3
,16 9
=(
-3 8
×3 8
)×3 8
,16 9
=(1-
)×3 8
×3 8
,16 9
=
×5 8
,2 3
=
;5 12
(5)
×8.8+0.6×3 5
+60%,1 5
=0.6×8.8+0.6×0.2+0.6,
=0.6×(8.8+0.2+1),
=0.6×10,
=6;
(6)
×[(7 25
-3 7
)×1 14
],5 6
=
×[7 25
×5 14
],5 6
=
×7 25
×5 14
,5 6
=
.1 12