问题
解答题
①8×(
②50%÷
③
④(6.7×60%+3.3×60%)÷
⑤10×(
|
答案
①原式=8×
×1 10 100 80
=1;
②原式=
×1 2
×3 2
-3 4 3 8
=
-9 16 3 8
=
;3 16
③原式=
×5 12
-12 7 2 3
=
-5 7 2 3
=
;1 21
④60%(6.7+3.3)×4
=60%×10×4
=24;
⑤原式=10×(
-8 5
×3 8
)8 3
=10×(
-1)8 5
=10×3 5
=6.