79.400+80=480

80.400-80=320

81.40×80=3200

82.400÷80=5

83.48÷16=3

84.96÷24=4

85.160×5=800

86.4×250=1000

87.0×518=0

88.10×76=760

89.36×10=360

90.15×6=90

91.24×3=72

92.5×18=90

93.26×4=74

94.7×15=105

95.32×30=960

96.40×15=600

97.60×12=720

98.23×30=690

99.30×50=1500

100.5×700=3500

63+2=65

52-15=37

12+64=76

15+5=20

52+15=67

55-19=36

2+73=75

63-2=61

10+78=88

55+19=74

8+45=53

15-5=10

48÷8=6

4×21=84

11×6=66

72÷3=24

12×2=24

10×10=100