H.7 Use expanded form to subtract three-digit numbers
Subtract 854 − 312 using expanded form.
854 = 800 + 50 + 4 312 = 300 + 10 + 2
Subtract the hundreds, the tens, and the ones.
854 − 312 = 500 + +
Now find the difference.
854 − 312 =
Subtract 864 − 231 using expanded form.
864 = 800 + 60 + 4 231 = 200 + 30 + 1
864 − 231 = 600 + +
864 − 231 =
Subtract 741 − 320 using expanded form.
741 = 700 + 40 + 1 320 = 300 + 20 + 0
741 − 320 = + + 1
741 − 320 =
Subtract 865 − 243 using expanded form.
865 = 800 + 60 + 5 243 = 200 + 40 + 3
865 − 243 = + + 2
865 − 243 =
Subtract 735 − 614 using expanded form.
735 = 700 + 30 + 5 614 = 600 + 10 + 4
735 − 614 = + + 1
735 − 614 =
Subtract 968 − 843 using expanded form.
968 = 900 + 60 + 8 843 = 800 + 40 + 3
968 − 843 = + + 5
968 − 843 =
Subtract 963 − 842 using expanded form.
963 = 900 + 60 + 3 842 = 800 + 40 + 2
963 − 842 = + + 1
963 − 842 =
Subtract 684 − 252 using expanded form.
684 = 600 + 80 + 4 252 = 200 + 50 + 2
684 − 252 = + + 2
684 − 252 =
Subtract 846 − 624 using expanded form.
846 = 800 + 40 + 6 624 = 600 + 20 + 4
846 − 624 = + + 2
846 − 624 =
Subtract 763 − 241 using expanded form.
763 = 700 + 60 + 3 241 = 200 + 40 + 1
763 − 241 = + + 2
763 − 241 =
Subtract 782 − 571 using expanded form.
782 = 700 + 80 + 2 571 = 500 + 70 + 1
782 − 571 = + + 1
782 − 571 =
Subtract 924 − 302 using expanded form.
924 = 900 + 20 + 4 302 = 300 + 0 + 2
924 − 302 = + + 2
924 − 302 =
Subtract 865 − 423 using expanded form.
865 = 800 + 60 + 5 423 = 400 + 20 + 3
865 − 423 = + + 2
865 − 423 =
Subtract 975 − 432 using expanded form.
975 = 900 + 70 + 5 432 = 400 + 30 + 2
975 − 432 = 500 + +
975 − 432 =
Subtract 642 − 210 using expanded form.
642 = 600 + 40 + 2 210 = 200 + 10 + 0
642 − 210 = 400 + +
642 − 210 =
Subtract 952 − 430 using expanded form.
952 = 900 + 50 + 2 430 = 400 + 30 + 0
952 − 430 = + + 2
952 − 430 =
Subtract 763 − 421 using expanded form.
763 = 700 + 60 + 3 421 = 400 + 20 + 1
763 − 421 = 300 + +
763 − 421 =
Your score is
The average score is 100%
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