Put proper signs '>', '<', '=' in the blanks: a) 2x5=10, Two tens=20; b) 2+10=12, Eighteen=18; c) 9+5=14; d) 10+2=12; e) 8 ones=8, 17; f) 1 ten 9 ones=19, 17+1=18. 2. Break up into tens and ones: a) 1

Here are the solutions for the exercise.

1. Put proper signs '>', '<', '=' in the blanks:

• a) $2 \times 5 = 10$ Two tens $= 20$ Comparing 10 and 20: $$10 \boxed{<} 20$$
• b) $2 + 10 = 12$ Eighteen $= 18$ Comparing 12 and 18: $$12 \boxed{<} 18$$
• c) $9 + 5 = 14$ Comparing 14 and 14: $$14 \boxed{=} 14$$
• d) $10 + 2 = 12$ Comparing 12 and 12: $$12 \boxed{=} 12$$
• e) 8 ones $= 8$ Comparing 8 and 17: $$8 \boxed{<} 17$$
• f) 1 ten 9 ones $= 10 + 9 = 19$ $17 + 1 = 18$ Comparing 19 and 18: $$19 \boxed{>} 18$$

2. Break up into tens and ones:

• a) $17 = \boxed{1 \text{ ten } 7 \text{ ones}}$
• b) Forty $= 40 = \boxed{4 \text{ tens } 0 \text{ ones}}$
• c) $24 = \boxed{2 \text{ tens } 4 \text{ ones}}$
• d) $6 + 8 = 14 = \boxed{1 \text{ ten } 4 \text{ ones}}$
• e) $4 + 4 = 8 = \boxed{0 \text{ tens } 8 \text{ ones}}$
• f) Thirty two $= 32 = \boxed{3 \text{ tens } 2 \text{ ones}}$
• g) $16 + 2 = 18 = \boxed{1 \text{ ten } 8 \text{ ones}}$