Abacus Subtraction Challenge

Subtract the following using abacus: 124 - 58

• 86

• 72

• 66

• 40

Subtract the following using abacus: 83 - 39

• 27

• 44

• 49

• 35

Subtract the following using abacus: 57 - 26

• 40

• 25

• 31

• 32

Subtract the following using abacus: 105 - 68

• 37

• 27

• 45

• 39

Subtract the following using abacus: 139 - 75

• 65

• 64

• 58

• 63

Subtract the following using abacus: 72 - 31

• 37

• 23

• 50

• 41

Subtract the following using abacus: 88 - 49

• 47

• 39

• 33

• 41

Subtract the following using abacus: 116 - 57

• 59

• 52

• 44

• 63

Subtract the following using abacus: 97 - 42

• 35

• 49

• 53

• 55

Subtract the following using abacus: 131 - 69

• 58

• 63

• 70

• 62