Page 83 - Start Up Mathematics_1

Tens Ones H T O
Eighteen is one with eight 1 8

eighteen 1 ten + 8 ones

1 bead in rod T shows
1 ten and 8 beads in
rod O show 8 ones.

H T O
Tens Ones

Nineteen is one with nine 1 9

nineteen 1 ten + 9 ones

1 bead in rod T shows
1 ten and 9 beads in
rod O show 9 ones.

H T O

Tens Ones
Twenty is two with zero 2 0

twenty 2 tens + 0 ones

2 beads in rod T show
2 tens or 20.

1 Fill in the blank boxes.

(a) fourteen (b) 17

(c) nineteen (d) 16

(e) ten (f) 20

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