计算.(1)3-0.5×2(2) 4 5 + 1 3 - 1 15 (3) 3 4 ÷(
计算.(1)3-0.5×2(2)45+13-115(3)34÷(12-38)(4)26.4÷(2.5×3-1.5)(5)(4.4-1.8)×(0.4+2)(6)2-54×...
计算.(1)3-0.5×2(2) 4 5 + 1 3 - 1 15 (3) 3 4 ÷( 1 2 - 3 8 )(4)26.4÷(2.5×3-1.5)(5)(4.4-1.8)×(0.4+2)(6)2- 5 4 × 8 15 - 1 3 (7)[1-( 1 6 + 1 4 )]÷ 7 10 .
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(1)3-0.5×2, =3-1, =2; (2)
=
=
(3)
=
=6; (4)26.4÷(2.5×3-1.5), =26.4÷(7.5-1.5), =26.4÷6, =4.4; (5)(4.4-1.8)×(0.4+2), =2.6×2.4, =6.24; (6)2-
=2-
=2-(
=2-1, =1; (7)[1-(
=[1-
=
=
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