Addition
What are synonyms for the word 'addition'?
add, altogether, join, sum, total, combine, together, more, in all, plus, increased
What are synonyms for the word 'subtraction'?
subtract, less, take away, minus, leave, difference, decrease, fewer, reduce, remains, left
Hande found 23 seashells and Ecem found 16 seashells on the beach. How many seashells did they find together?
Hande found 23 seashells and Ecem found 16 seashells on the beach. How many seashells did they find together?
Plan: 23+16=? OR 16+23=? OR ?-16=23 OR
?-23=16
Solve: 23+16=39
Explanation: Hande and Ecem found 39 seashells together.
12+?=82
12+?=82
12+70=82
?=70
Round this number to the nearest 10.
85
Round this number to the nearest 10.
85
90
25+73=?
25+73=98
89-24=?
89-24=65
Aylin picked 49 apples from the orchard and gave 25 apples to Su. How many apples does Aylin have now?
Aylin picked 49 apples from the orchard and gave 25 apples to Su. How many apples does Aylin have now?
PLAN: 49-25=? OR 49-?=25 OR ?+25=49 OR
25+?=49
SOLVE: 49-25=24
EXPLAIN: Aylin has 24 apples now.
?+68=90
?+68=90
22+68=90
?=22
Round this number to the nearest 10 and the nearest 100.
456
Round this number to the nearest 10 and the nearest 100.
456
Nearest 10- 460
Nearest 100- 500
73+29=?
73+29=102
45-26=?
45-26=19
Kally found 332 pinecones. Heather found 484 pinecones. Fatma found 176 pinecones. How many pinecones did the three friends find altogether?
PLAN: 332+484=?, ?+176=??
SOLVE: 332+484=816, 816+176=992
EXPLAIN: The three friends found 992 pinecones altogether.
87=?+15
87=?+15
87=72+15
?=72
Round to the nearest tens to estimate the sum.
56+34=?
Round to the nearest tens to estimate the sum.
56+33=?
60+30=90
832+189=?
832+189=1021
687-398=?
687-398=289
In the morning, Rasha baked 126 cupcakes for her bakery. She baked 228 more cupcakes that afternoon. 13 cupcakes are left at the end of the day. How many cupcakes were sold that day?
PLAN: 126+228=?, ?-13=??
SOLVE:126+228=354, 354-13=341
EXPLAIN: The bakery sold 341 cupcakes that day.
17+?+24=93
17+?+24=93
17+52+24=93
?=52
Round to the nearest hundreds to estimate the difference.
951-753=?
Round to the nearest hundreds to estimate the difference.
951-753=?
1000-800=200
262+239 +482=?
262+239+482=983
726-157-170=?
726-157-170=399
While Chrissie was camping for a week. It rained for three days. The weather records said it rained 3mm, 6mm, and 5mm on those three days. During the same week, it rained 26mm at her home. How much less rain did she experience while camping?
PLAN: 3+6=?, ?+5=??, 26-??=???
SOLVE: 3+6=9, 9+5=14, 26-14=12
EXPLAIN: Chrissie had 12mm less rain while camping than at her home.
643=57+486+?
643=57+486+?
643=57+486+100
?=100
Round to the nearest 10 to estimate the sum.
65+167+369=?
Round to the nearest 100 to estimate the sum.
65+167+369=?
Round to the nearest 10 to estimate the sum.
65+167+369=?
70+170+370=640
Round to the nearest 100 to estimate the sum.
65+167+369=?
100+200+400=700