Answer:
A) Yes
B) Yes
C) Yes
D) No
Explanation:
The make a ten strategy is a way of adding numbers together by breaking them into unit of tens and adding the units together to derive ten.
To determine if Lucas make a ten to help him find the sum, we would break each two digit number down in tens, sum the remainder together and two digits number separately. From the sum of the remainder, we should get digit in ten
A) 46 + 12 + 34 + 63
= (40 +6) + (10+2) + (30+4) +(60+3)
= (40 + 10 + 30 + 60) + (6+2+4+3)
= (140 ) + (6+4) +(2+3) = 140 + 10 + 5
= 150 + 5
= 155
Yes: we were able to add the remainder to give answer in tens
b. 29 + 54 +55 + 61
= (20+9) + (50+4) + (50+5) + (60+1)
= (20+50+50+60) + (9+4+5+1)
= 180 + (9+1) +(4+5) = 180 + 10 + 9
= 190+9
= 199
Yes: we were able to add the remainder to give answer in tens
C. 45 + 27 +62 + 74
(40+5) + (20+7) + (60+2) + (70+4)
= (40+20+60+70) + (5+7+2+4)
= 190 + (5+2) + 7 +(3+1)
= 190 + 7 + (7+3) + 1 = 190+7+10+1
= 200+8
= 208
Yes: we were able to add the remainder to give answer in tens
d. 44 + 91 - 37 + 10
(40+4) + (90+1) - (30 + 7) + 10
= (40+90+10) + (4+1) - 30 -7
= (90+10)+ 40 - 30 + 5 - 7
= 100+ (40-30) + (5-7)
= 100 + 10 - 2
= 108
No: after breaking the two digits in tens, we were unable to add the remainder to give answer in tens