| 递等式计算. (1)6129-(715+1129)-285 (2)3279+481÷37 (3)6868÷34×720 (4)13320-222×56. |
| (1)6129-(715+1129)-285, =6129-715-1129-285, =(6129-1129)-(715+285), =5000-1000, =4000; (2)3279+481÷37, =3279+13, =3292; (3)6868÷34×720, =202×720, =145440; (4)13320-222×56, =13320-12432, =888. |
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