1.	Estimate the difference to the nearest ten. 298 − 108
		A.	180	B.	170
		C.	200	D.	190
		Hint
	2.	Estimate the difference to the nearest ten. 769 − 335
		A.	450	B.	430
		C.	440	D.	420
		Hint
	3.	Estimate the difference to the nearest ten. 143 − 82
		A.	80	B.	60
		C.	0	D.	40
		Hint
	4.	Estimate the difference to the nearest hundred. 298 − 108
		A.	400	B.	100
		C.	200	D.	90
		Hint
	5.	Which is a better estimate for 696 − 187?
		A.	696 − 187 is 509 which is closer to 510 than 500 so the nearest ten is better.	B.	696 − 187 is 501 which is closer to 510 than 500 so the nearest ten is better.
		C.	696 − 187 is 501 which is closer to 500 than 510 so the nearest hundred is better.	D.	696 − 187 is 509 which is closer to 510 than 500 so the nearest hundred is better.
		Hint