
计算下面各题,能简算的要简算. 15.28-3.99-9.01 (927+729)÷(57+5
计算下面各题,能简算的要简算.15.28-3.99-9.01(927+729)÷(57+59)(56×2.4-1.5)÷(0.75÷12)...
计算下面各题,能简算的要简算. 15.28-3.99-9.01 (927+729)÷(57+59) (56×2.4-1.5)÷(0.75÷12)
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(1)15.28-3.99-9.01
=15.28-(3.99+9.01),
=15.28-13,
=2.28;
(2)(9
+7
)÷(
+
)
=(
+
)÷[5×(
+
)],
=65×(
+
)÷5÷(
+
),
=65÷5×[(
+
)÷(
+
)],
=13×1,
=13;
(3)(
×2.4-1.5)÷(0.75÷
)
=(2-1.5)÷1.5,
=0.5÷1.5,
=
.
=15.28-(3.99+9.01),
=15.28-13,
=2.28;
(2)(9
2 |
7 |
2 |
9 |
5 |
7 |
5 |
9 |
=(
65 |
7 |
65 |
9 |
1 |
7 |
1 |
9 |
=65×(
1 |
7 |
1 |
9 |
1 |
7 |
1 |
9 |
=65÷5×[(
1 |
7 |
1 |
9 |
1 |
7 |
1 |
9 |
=13×1,
=13;
(3)(
5 |
6 |
1 |
2 |
=(2-1.5)÷1.5,
=0.5÷1.5,
=
1 |
3 |
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