四年级口算1000题(19)

61 + 9 -104 62 + 18 -88 63 + 27 -72 = 64 + 36 -56 65 + 45 -40 = 66 + 54 -24 = 67 + 63 -8 = 68 + 72 + 8 = 69 + 81 + 24 70 -60 -260 71 -51 -244 = 72 -42 -228 = 73 -33 -212 = 74 -24 -196 = 25 -15 -80 = 26 -6 -64 = 27 + 3 -48 = 28 + 12 -32 29 + 21 -16 = 30 + 30 + 0 = 31 + 39 + 16 = 32 + 48 + 32 =