题目内容
①11
×7
-7
×2
+7
②
×668+
×666
③0.25×32×0.125
④
+
+
+
+
+
+
+
+
.
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 4 |
| 1 |
| 9 |
②
| 19 |
| 83 |
| 64 |
| 83 |
③0.25×32×0.125
④
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
| 1 |
| 110 |
①11
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 4 |
| 1 |
| 9 |
=(11
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 9 |
=10×7
| 1 |
| 9 |
=10×(7+
| 1 |
| 9 |
=10×7+10×
| 1 |
| 9 |
=70+1
| 1 |
| 9 |
=71
| 1 |
| 9 |
②
| 19 |
| 83 |
| 64 |
| 83 |
=
| 19 |
| 83 |
| 64 |
| 83 |
=
| 19 |
| 83 |
| 19 |
| 83 |
| 64 |
| 83 |
=(
| 19 |
| 83 |
| 64 |
| 83 |
| 19 |
| 83 |
=1×666+
| 38 |
| 83 |
=666
| 38 |
| 83 |
③0.25×32×0.125,
=0.25×(4×8)×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;
④
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
| 1 |
| 110 |
=
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 4×5 |
| 1 |
| 5×6 |
| 1 |
| 6×7 |
| 1 |
| 7×8 |
| 1 |
| 8×9 |
| 1 |
| 9×10 |
| 1 |
| 10×11 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
| 1 |
| 11 |
=
| 1 |
| 2 |
| 1 |
| 11 |
=
| 9 |
| 22 |
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