能简算的要简算.7.19+5.4+2.91+14.6 18.5-(5.6+4.8)÷1.3 79÷...
能简算的要简算.7.19+5.4+2.91+14.618.5-(5.6+4.8)÷1.379÷115+511×296760÷13+17×251320×99+13207.3...
能简算的要简算.7.19+5.4+2.91+14.6 18.5-(5.6+4.8)÷1.3 79÷115+511×296760÷13+17×25 1320×99+13207.32×4.8+0.52×73.2
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(1)7.19+5.4+2.91+14.6
=(7.19+2.91)+(5.4+14.6)
=10.1+20
=30.1;
(2)18.5-(5.6+4.8)÷1.3
=18.5-10.4÷1.3
=18.5-8
=10.5;
(3)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
;
(4)6760÷13+17×25
=520+425
=945;
(5)
×99+
=
×(99+1)
=
×100
=65;
(6)7.32×4.8+0.52×73.2
=7.32×4.8+5.2×7.32
=7.32×(4.8+5.2)
=7.32×10
=73.2.
=(7.19+2.91)+(5.4+14.6)
=10.1+20
=30.1;
(2)18.5-(5.6+4.8)÷1.3
=18.5-10.4÷1.3
=18.5-8
=10.5;
(3)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=
7 |
9 |
5 |
11 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(4)6760÷13+17×25
=520+425
=945;
(5)
13 |
20 |
13 |
20 |
=
13 |
20 |
=
13 |
20 |
=65;
(6)7.32×4.8+0.52×73.2
=7.32×4.8+5.2×7.32
=7.32×(4.8+5.2)
=7.32×10
=73.2.
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