1.	Tell which equation is an estimate for
		A.	420 + 10 = 430	B.	400 × 10 = 4,000
		C.	400 × 5 = 2,000	D.	500 × 10 = 5,000
		Hint
	2.	Estimate 82 × 57.
		A.	80 × 60 = 4,800	B.	80 + 60 = 140
		C.	80 × 50 = 4,000	D.	90 × 60 = 5,400
		Hint
	3.	Estimate 89 × 81.
		A.	90 + 80 = 170	B.	90 × 90 = 8,100
		C.	80 × 80 = 6,400	D.	90 × 80 = 7,200
		Hint
	4.	Estimate196 × 31.
		A.	100 × 30 = 3,000	B.	200 + 30 = 230
		C.	200 × 40 = 8,000	D.	200 × 30 = 6,000
		Hint
	5.	Estimate13 × 38.
		A.	20 × 40 = 800	B.	10 × 40 = 400
		C.	10 + 40 = 50	D.	20 × 30 = 600
		Hint