Number Architect Worksheet
Blueprint Math Series Grade 3 Operations
Number Architect Worksheet
Name:
Date:
Score:
/16
Rule of Structure Always line up columns! Add or subtract the Ones first, then Tens, then Hundreds.
H|T|O
1
Phase 1: Foundation Addition (No Regrouping)
Add ones, tens, hundreds from right to left
#01
HTO
3 4 2
#02
HTO
6 1 4
#03
HTO
5 0 7
#04
HTO
4 3 1
#05
HTO
7 2 0
#06
HTO
2 5 3
2
Phase 2: Demolition Subtraction (No Regrouping)
Subtract bottom digits from top digits
#07
HTO
8 7 9
− 3 4 5
#08
HTO
6 5 8
− 2 1 4
#09
HTO
9 4 6
− 6 2 3
#10
HTO
7 8 5
− 4 5 1
#11
HTO
5 9 3
− 2 7 1
#12
HTO
8 6 4
− 5 3 0
Target: Accurate Column Alignment
Page 1 of 2 | Turn over for Site Missions →
Number Architect // Site Missions
Name:
Page 2 of 2
3
Phase 3: Blueprint Inspection (Watch the Signs!)
Notice + or −
#13 H T O
5 2 3
#14 H T O
7 9 8
− 3 6 2
#15 H T O
4 0 6
#16 H T O
9 8 5
− 6 4 0
4
Phase 4: Site Supervisor Word Problems
Mission #17 Materials Delivery
The bricklaying crew ordered 455 red clay bricks on Tuesday and 322 grey paving stones on Thursday. How many total masonry pieces did the crew receive?
Vertical Workspace:
H T O
Total Pieces:
Mission #18 Wire Installation
The electrician brought a large spool containing 875 feet of heavy copper wire. By midday, the crew installed 531 feet of wire. How many feet of wire remain on the spool?
Vertical Workspace:
H T O
Remaining Wire:
ft
Phase 5: Supervisor's Vault Decoder
Solve each problem to unlock the secret security word!
Box A +
6 3 1
+ 2 4 7
Box B −
9 5 4
− 4 3 2
Box C +
3 1 2
+ 4 5 6
Box D −
8 9 7
− 6 8 2
Code Key:
878 = S 522 = A 768 = F 215 = E
Passcode:
Certified Blueprint Master Inspector
Architect Signature: _______________________
