问题
解答题
|
答案
(1)3.75×
+3 5
×1.25,3 5
=(3.75+1.25)×
,3 5
=5×
,3 5
=3;
(2)0.25×1.25×32,
=0.25×1.25×8×4,
=(0.25×4)×(1.25×8),
=1×10,
=10;
(3)
+5 7
+12 3
+81 3
,2 7
=(
+85 7
)+(2 7
+12 3
),1 3
=9+2,
=11;
(4)(
+1 4
+5 6
)÷1 12
,1 12
=(
+1 4
+5 6
)×12,1 12
=
×12+1 4
×12+5 6
×12,1 12
=3+10+2,
=15;
(5)5.36-1.86-3.14,
=5.36-(1.86+3.14),
=5.36-5,
=0.36;
(6)6.8×8+3.5×8-44,
=(6.8+3.5)×8-44,
=10.3×8-44,
=82.4-44,
=38.4.