题目内容
怎样算简便就怎样算.
①46×8-120÷15
②
×
+
÷7
③6.28+7.13-(5.13+3.28)
④
+(
-
)×
⑤(12.5×8-40)÷0.6
⑥(
-
+
)×72.
①46×8-120÷15
②
| 4 |
| 9 |
| 6 |
| 7 |
| 4 |
| 9 |
③6.28+7.13-(5.13+3.28)
④
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 3 |
⑤(12.5×8-40)÷0.6
⑥(
| 5 |
| 12 |
| 1 |
| 9 |
| 3 |
| 8 |
①46×8-120÷15,
=368-8,
=360;
②
×
+
÷7,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
③6.28+7.13-(5.13+3.28),
=6.28+7.13-5.13-3.28,
=(6.28-3.28)+(7.13-5.13),
=3+2,
=5;
④
+(
-
)×
,
=
+
×
-
×
,
=
+
-
,
=2-
,
=
;
⑤(12.5×8-40)÷0.6,
=(100-40)÷0.6,
=60÷0.6,
=100;
⑥(
-
+
)×72,
=
×72-
×72+
×72,
=30-8+27,
=22+27,
=49.
=368-8,
=360;
②
| 4 |
| 9 |
| 6 |
| 7 |
| 4 |
| 9 |
=
| 4 |
| 9 |
| 6 |
| 7 |
| 4 |
| 9 |
| 1 |
| 7 |
=(
| 6 |
| 7 |
| 1 |
| 7 |
| 4 |
| 9 |
=1×
| 4 |
| 9 |
=
| 4 |
| 9 |
③6.28+7.13-(5.13+3.28),
=6.28+7.13-5.13-3.28,
=(6.28-3.28)+(7.13-5.13),
=3+2,
=5;
④
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 4 |
| 5 |
| 5 |
| 3 |
| 2 |
| 3 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 4 |
| 3 |
| 10 |
| 9 |
=2-
| 10 |
| 9 |
=
| 8 |
| 9 |
⑤(12.5×8-40)÷0.6,
=(100-40)÷0.6,
=60÷0.6,
=100;
⑥(
| 5 |
| 12 |
| 1 |
| 9 |
| 3 |
| 8 |
=
| 5 |
| 12 |
| 1 |
| 9 |
| 3 |
| 8 |
=30-8+27,
=22+27,
=49.
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