718 + 19 = 18 - 19 = 58 - 38 = 1- 38 - 18 =
0.8- 12 = 2- 56 = 34 +0.75= 25 + 23 - 35 =
17 + 18 = 34 - 16 = 29 + 718 = 1119 + 819 =
13 - 15 = 3- 12 = 76 - 712 = 910 - 45 =
6.5÷100= 4.8×0.1= 5÷7= 0.5×40=
16 - 17 = 13 + 14 = 0.5+ 12 = 0.75- 34 =