1000 problemas de aritmética oral de multiplicación y división decimal para quinto grado de primaria.
17×40=680, 100-63=37, 3,2 1,68=4,88, 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÷0,5=270
3/4 1/4 =1, 2 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4
1/6 1/2 - 1/6 =1/2, 7,5-(2,5 3,8)=1,2, 7/8 3/8 =5/4