问题
解答题
脱式计算,能简算的要简算
|
答案
(1)3
+34 11
+63 7 7 11
=3
+64 11
+37 11 3 7
=10+33 7
=13
;3 7
(2)47×2.8+52×2.8+2.8
=2.8×(47+52+1)
=2.8×100
=280;
(3)37.6-4.87-1.13
=37.6-(4.87+1.13)
=37.6-6
=31.6;
(4)31-[0.5×(6-5.7)+18]
=31-[0.5×0.3+18]
=31-18.15
=12.85;
(5)9.3÷[24×(1-
)+3.6]3 8
=9.3÷[24×1-24×
+3.6]3 8
=9.3÷18.6
=0.5;
(6)[(
+3 2
)÷8 3
-5 6
]÷7 3 8 9
=[
÷25 6
-5 6
]÷7 3 8 9
=[
÷25 6
-5 6
]÷7 3 8 9
=[5-
]÷7 3 8 9
=
÷8 3 8 9
=3;
故答案为13
;280;31.6;12.85;0.5;3.3 7