3/4-1/2=?8×(3/4-1/2)=?15×7/25-4/5=?36×7/12+5/12=?
2个回答
1/4
2
17/5
257/12
相关问题
计算:(1)(-8)×(-7); (2)12×(-5); (3)(-36)×(-1); (4)(-25)×1
3 4 ×12 = 5 7 × 2 7 = 2 3 × 3 4 × 1 8 = 1 10 × 1 4 = 2 9 × 5
口算:[5/9]×15= [3/5]×2= [1/4]×[4/5]= [1/9]×[3/7]= [7/12]×[3/4]
简便计算. 4 5 × 3 8 + 4 5 × 1 2 (3× 5 12 )×4 3 7 × 2 9 × 7 8 4 9
7/5×5= 7/10×4= 3/4×12= 5×2/15=
计算:(1)(−36)×(54−56−712)(2)4.7×3.6+5.4×12+5.3×3.6+4.6×12(3)(−
12×(2/15-1/12)-1/4 9/11×(3/5-3/7+2/5-4/7) 能简便简便
计算,怎样简便怎样算 [7/12]×[3/8]+[7/12]×[5/8] [5/7]×[3/4]×[2/5] ([5/1
5×+7.4=31.80.7×+3.4×=37.72(×-12)÷4=4.55×(×+2.4)=25.53.2×+1.8
(—36)×(—4/9+5/6—7/2)=___?25×(—3/4)—(—25)×1/2+25×(1/4)=____?