The people's education edition of 600 lessons in the second volume of fifth grade mathematics oral calculation:17× 40 =100-63 = 3.2+1.68 = 2.8× 0.4 =14-7.4 =/kloc-0. 06=0.75÷ 15=0.4×0.8=4×0.25=0.36+ 1.54= 1.0 1×99=420÷35=25× 12= 135÷0.5=3/4+ 1/4=2+4/9=3-2/3=3/4- / kloc-0//2= 1/ 6+ 1/2- 1/6=7.5-(2.5+3.8)=7/8+3/8=3/ 10+ 1/5=4/5-7/ 10=2- 1/6- 1/ 3=0.5 1 ÷ 17=32.8+ 19=5.2÷ 1.3= 1.6×0.4=4.9×0.7= 1÷5=6÷ 12=0.87-0.49= 17×40= 100-63=3.2+ 1 .68=2.8×0.4= 14-7.4= 1.92÷0.04=0.32×500=0.65+4.35= 10-5.4=4÷20=3.5×200= 1.5-0.06=0.75÷ 15=0.4×0.8=4×0.25=0.36+ / kloc-0/.54= 1.0 1× 99=420÷35=25× 12= 135÷0.5=3/4+ 1/4=2+4/9=3-2/3=3/4- 1/2= 1/6+ 1/2- 1 /6=7.5-(2.5+3.8)=7/8+3/8=3/ 10+ 1/ 5=4/5-7/ 10=2- 1/6- 1/ 3=0.5 1÷ 17=32.8+ 19=5.2÷ 1 .3= 1.6×0.4=4.9×0.7= 1÷5=6÷ 12=0.87-0.49= 17×40= 100-63=3.2+ 1.68=2.8×0.4= 14-7.4= 1 .92÷0.04=0.32×500=0.65+4.35= 10-5.4=4÷20=3.5×200= 1.5-0.06=0.75÷ 15=0.4×0.8=4×0.25=0.36+ 1.54= 1.0 1 × 99=420÷35=25× 12= 135÷0.5=3/4+ 1/4=2+4/9=3-2/3=3/4- 1/2= 1/6+ 1/2- 1/6=7.5-(2.5+3.8)=7/8+3/8=3/ / kloc-0/0+ 1/ 5=4/5-7/ 10=2- 1/6- 1/ 3=0.5 1÷ 17=32.8+ 19=5.2÷ 1.3= 1.6×0.4=4.9×0.7= / kloc-0/÷5=6÷ 12=0.87-0.49= 17×40= 100-63=3.2+ 1.68=2.8×0.4= 14-7.4= 1.92÷0.04=0.32×500=0.65+4.35= 1 0-5.4=4÷20=3.5×200= 1.5-0.06=0.75÷ 15=0.4×0.8=4×0.25=0.36+ 1.54= 1.0 1× 99=420÷35=25× 12= 135÷0.5=3/ 4+ 1/4=2+4/9=3-2/3=3/4- 1/2= 1/6+ 1/2- 1/6=7.5-(2.5+3.8)=7/8+3/8=3/ 10+ 1/ 5=4/5-7/ 10=2- / kloc-0//6- 1/ 3=0.5 1÷ 17=32.8+ 19=5.2÷ 1.3= 1.6×0.4=4.9×0.7= 1÷5=6÷ 12=0.87-0.49= 1 7×40= 100-63=3.2+ 1.68=2.8×0.4= 14-7.4= 1.92÷0.04=0.32×500=0.65+4.35= 10-5.4=4÷20=3.5×200= 1.5-0.06=0.75÷ / kloc-0/5=0.4×0.8=4×0.25=0.36+ 1.54= 1.0 1× 99=420÷35=25× 12= 135÷0.5=3/4+ 1/4=2+4/9=3-2/3=3/4- 1/2= / kloc-0//6+ 1/2- 1/6=7.5-(2.5+3.8)=7/8+3/8=3/ 10+ 1/ 5=4/5-7/ 10=2- 1/6- 1/ 3=0.5 1÷ 1 7=32.8+ 19=5.2÷ 1.3= 1.6×0.4=4.9×0.7= 1÷5=6÷ 12=0.87-0.49= 17×40= 100-63=3.2+ 1.68=2.8×0.4= / kloc-0/4-7.4= 1.92÷0.04=0.32×500=0.65+4.35= 10-5.4=4÷20=3.5×200= 1.5-0.06=0.75÷ 15=0.4×0.8=4×0.25=0.36+ 1.54= / kloc-0/.0 1× 99=420÷35=25× 12= 135÷0.5=3/4+ 1/4=2+4/9=3-2/3=3/4- 1/2= 1/6+ 1/2- 1/ 6=7.5-(2.5+3.8)=7/8+3/8=3/ 10+ 1/5=4/5-7/ 10=2- 1/6- 1/3=