问题
解答题
|
答案
102×45
=100×45+2×45
=4500+90
=4590；
8.76-5.29-2.71+1.24
=8.76+1.24-（5.29+2.71）
=10-8
=2；
3.31-18.3÷7×0.5
=3.31-18
×3 10
×1 7 1 2
=3.31-
×183 10
×1 7 1 2
=3
-31 100 183 140
=
-331 100 183 140
=
-2317 700 915 700
=1402 700
=2
；1 350
1-（
+1 5
）×1 3 15 8
=1-
×1 5
-15 8
×1 3 15 8
=1-
-3 8 5 8
=0；
24×
+51×51 43 19 43
=24×
+19×51 43 51 43
=（24+19）×51 43
=43×51 43
=51；
÷（9 14
-5 6
）×3 4 7 24
=
÷9 14
×1 12 7 24
=
×12×9 14 7 24
=
．9 4
