2. Adding and Subtracting through the 10s and 100s

 Adding and Subtracting 100s, 10s and 1s

-We are learning to solve subtraction problems by subtracting 100s, 10s and 1s.

-We are learning to solve addition problems by adding 100s, 10s and 1s

Question	Working	Answer
475 +158=	400+100=500 70+50=120 5+8=13=conbine	633
199+188=	100+100=200 80+90=170 8 + 9 = 17 conbine	387
634+197=	600+100=700 30+90=120 4+7=11conbine	831
188+189=	100+100=200 80+80=160 8+9=17conbine	377
299+156=	200+100=300 90+50=140 9+6=15conbine	455

Question	Working	Answer
482-394=	400-300= 100 80-90=10 4-2=2	88
531-198=	500-100=400 31-98=67	333
535-379=	500-300=200 35-79=44	156
933-399=	900-300=600 33-99=66	534
221-177=	200-100=100 21-77=56	44

Word problems

Problem	Working and answer
Miss Davis had $833 she spent $245 at the supermarket. How much money does Miss Davis have left?	800-200=600 33-45=142         588
The bakery made 174 cookies in the morning and they made another 289 cookies in the afternoon. How many cookies did they made that day?	100+200=300 74+89= 463
There are 374 children at the park. 198 children leave. How many children are left at the park?	300-100=200 74-98=24    176