六年级简便运算50道及答案答:2.8×0.4= 1.12 14-7.4=6.6,1.92÷0.04=48,0.32×500=160,0.65+4.35= 5 10-5.4=4.6,4÷20=0.2,3.5×200=700,1.5-0.06=1.44 0.75÷15=0.05,0.4×0.8=0.32,4×0.25=1,0.36+1.54=2 1.01×99=99.99,420÷35=12,25×12=300,135...
六年级下册简便运算。解比例20道计算。答:1,x-y=2 xy=15 (x=5,y=3) 2,x+y=6 x-y=2 (4,2) 3,x+y=11,xy=30 (x=5,y=6,x=6,y=5) 4,x+y=13,xy=42 (x=6,7,y=7,6) 5,x+y=11,x-y=1 (x=6,y=5) 6,x+y=12,xy=35 (x=5,7,y=7,5) 7,x+y=5,xy=6 (x=2,3,y=3,2) 8,x-y=5,xy...