Addition Within 1000: Missing Numbers and Equation Balance
Find missing numbers inside expressions, then make both sides of equations equal. Subtract the known addend from the sum to find the missing number.
30 problems · A4 · 1 page
What’s in this worksheet?
These 30 problems use numbers within 1000. Find missing numbers inside expressions, then make both sides of equations equal. Subtract the known addend from the sum to find the missing number. Try 375 + 248 = □ + 375.
Addition Within 1000: Missing Numbers and Equation Balance
Name: ___________Date: ___________Time: ___________
989+=998
739+=991
24+=601
368+=745
813+=846
+184=801
+481=714
824+=858
+80=305
827+=843
+77=635
+491=966
+14=625
312+=531
981+=990
87+550=+632
49+712=181+
163+8=45+
285+339=+443
850+39=637+
+108=239+8
+97=132+713
29+=262+48
35+178=50+
36+=140+68
+369=57+359
482+320=466+
176+=164+58
576+76=+641
6+760=+620