If it is cut into 2 equal parts,

25. A rope is 60 ft. long.

what will be the length of each part?

26. A father divided 90 apples equally among his 3 daughters. How many apples did each receive?

27. How many 20's are there in 80-?

28. There are 100 cherries in a basket.

girls can have 20 cherries each?

How many

29. Mary has 60 chickens and Ann has as many as Mary. How many chickens has Ann?

30. How many 30's are there in 90?

3. Marcus read 80 pages, which was 4 times as many as Henry read. How many pages did Henry read?

1. Count by ones from ten to forty; from forty to seventy; from seventy to one hundred.

2. How many tens and ones are there in 32? in 55? in 78? in 47? in 80? in 69?

3. 1 ten 3 ones is written 13, and read thirteen.

4. 2 tens 5 ones is written 25, and read twenty-five.

5. 4 tens 6 ones is written 46, and read forty-six.

6. 6 tens 4 ones is written

and read

When a whole number is expressed by two figures, the figure at the left denotes tens, and the figure at the right denotes ones.

Ones

Tens

Ones

PRELIMINARY REVIEW

For illustration of the terms used on this page, the pupil may refer to page 24.

/. What number is the sum of 10 and 4? 9 and 5? 8 and 6? 7 and 7?

2. Name all the pairs of numbers less than 11 whose sum is 11; 12; 13; 14; 15; 16; 17; 18.

3. How many, then, are 8+ 7? 9+6? 7+5? 8+9? 4. How many are 11 less 5? 12 less 6? 13 less 7? 14 less 8? 15 less 9?

5. Name, in like manner, all the pairs of numbers, one greater and the other less than 10, whose difference is 2; 3; 4; 5; 6; 7; 8; 9.

8?

6 How many, then, are 13-5? 16-9? 15 - 7? 17 —

7. Find 5 +5 +5 by addition. Find it by multiplication. 8. Find 3 x 6 by addition. Find it by multiplication. 9. How many are 5 × 3? 2 × 7? 4 x4? 2 x 10? 10. How many 3's are there in 6? in 12? in 6+12? //. How many 2's are there in 8? in 14? in 14-8? 12. How many 2's are there in 6+8? Then find 6+8 by multiplication.

(3 twos + 4 twos = 7 twos = 7 x 2 = 14.)

Find the following by multiplication :

95.

Instead of 2, add 1, 3; 4; 5; 6; 7; 8; 9.

Instead of 3, add 1; 2; 4; 5; 6; 7; 8; 9.

Instead of 5, add 1; 2; 3; 4; 6; 7; 8; 9.

Instead of 7, add 1; 2; 3; 4; 5; 6; 8; 9.

5. Add 4 to 5; 15; 25; 35; 45; 55; 65; 75; 85;

Instead of 4, add 1; 2; 3; 5; 6; 7; 8; 9.

6. Add 6 to 6; 16; 26; 36; 46; 56; 66; 76; 86; 96. Instead of 6, add 1; 2; 3; 4; 5; 7; 8; 9.

7. Add 8 to 7; 17; 27; 37; 47; 57; 67; 77; 87; 97. Instead of 8, add 1; 2; 3; 4; 5; 6; 7; 9.

8. Add 1 to 8; 18; 28; 38; 48; 58; 68; 78; 88; 98. Instead of 1, add 2; 3; 4; 5; 6; 7; 8; 9.

9. Add 9 to 9; 19; 29; 39; 49; 59; 69; 79; 89; 99. Instead of 9, add 1; 2; 3; 4; 5; 6; 7; 8.