问题
解答题
|
答案
(1)
+5 9
+3 11
+5 9 8 11
=(
+5 9
)+(5 9
+3 11
),8 11
=
+1,10 9
=2
;1 9
(2)
×7 18
+1 4
×3 4 7 18
=(
+1 4
)×3 4
,7 18
=1×
,7 18
=
;7 18
(3)
-(7 15
-7 15
)+3 7 4 7
=
-7 15
+(7 15
+3 7
),4 7
=0+1,
=1;
(4)8×(4-3.75)÷0.1
=8×0.25÷0.1,
=2÷0.1,
=20;
(5)(
-7 12
)×12×185 18
=
×12×18-7 12
×12×18,5 18
=126-60,
=66;
(6)(15.6+9.744÷2.4)×0.5
=(15.6+4.06)×0.5,
=19.66×0.5,
=9.83.