计算下面各题,能用简便算法的要用简便算法. (1)10- 8 9 × 3 8 ÷ 3 4 (2)2- 5 11 - 6 11 (3) 3 4 × 5 7 - 3 4 × 1 7 (4) 1 4 ÷(3- 5 13 - 8 13 )
(1)10-
=10-
=10-
=9
(2)2-
=2-(
=2-1, =1; (3)
=
=
=
(4)
=
=
=
=
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计算下面各题,能用简便算法的要用简便算法. (1)10- 8 9 × 3 8 ÷ 3 4 (2)2- 5 11 - 6 11 (3) 3 4 × 5 7 - 3 4 × 1 7 (4) 1 4 ÷(3- 5 13 - 8 13 )
(1)10-
=10-
=10-
=9
(2)2-
=2-(
=2-1, =1; (3)
=
=
=
(4)
=
=
=
=
|
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