Big Friends Bridge — Lesson 47: Big friends: all the adding

What your child does, card by card

Big friends: all the adding. Practice day! PlayBuddy opens the lesson: “Practice time. Let's get quicker and better.”

Watch me: 4, 9, 8, 2 and 12 appear on the beads one move at a time, each bead ringed in green before it goes. Beads free? Push. Top bead free? Small friend. No room? Big friend.

Try it puts a green ring on each next bead; your child works out 6 + 5, 4 + 7 and 3 + 4.

Fast sums: a mission of 10 tasks with a clock against your child’s own best time. Your child must work out 3 + 9, 4 + 8, 9 + 7, 5 + 5, 3 + 4, 7 + 4, 8 + 3, 2 + 6, 9 + 2 and 9 + 1.

Copy me: the beads show 11, 15 and 13 and your child answers by tapping the drawn fingers, the hands window glowing.

Then the beads hide and the sums 5 + 5, 8 + 4 and 7 + 9 are done in the head, the answer shown on the fingers.

You're ready! You can add past ten with every big friend.

What this lesson trains

19 answers in about five minutes. The tasks take 30 bead moves in all: 9 with a top bead and 21 with bottom beads. Up to 16, read and set from the left. Then 3 quick looks in your head. Friends do 12 of the 13 sums, by +5 = −5 +10, +7 = −3 +10, +4 = +5 −1, +9 = −1 +10, +8 = −2 +10, +4 = −6 +10, +3 = −7 +10, +2 = −8 +10 and +1 = −9 +10.

Your child’s first moves: work out 6 + 5, 4 + 7 and 3 + 4.

Fingers and hands

Below the abacus the drawn hands show zero and 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15 and 16 here, finger for bead: the left hand counts the tens, the right hand the ones.

+4 on the fingers: the thumb opens and one finger closes (+5 −1).

+5 on the fingers: the right hand lets 5 go and the left hand opens one more finger for the ten (−5 +10). +7 on the fingers: the right hand lets 3 go and the left hand opens one more finger for the ten (−3 +10). +9 on the fingers: the right hand lets 1 go and the left hand opens one more finger for the ten (−1 +10). +8 on the fingers: the right hand lets 2 go and the left hand opens one more finger for the ten (−2 +10). +4 on the fingers: the right hand lets 6 go and the left hand opens one more finger for the ten (−6 +10). +3 on the fingers: the right hand lets 7 go and the left hand opens one more finger for the ten (−7 +10). +2 on the fingers: the right hand lets 8 go and the left hand opens one more finger for the ten (−8 +10). +1 on the fingers: the right hand lets 9 go and the left hand opens one more finger for the ten (−9 +10).

In Copy me the beads lead with 11, 15 and 13, and your child answers on the fingers: the reverse of making a number on the beads.

What PlayBuddy and PlayType say

PlayBuddy: “First try the beads. Then the small friend. Then the big friend.”

Stars

Three stars for up to 1 slip in 19 answers, two stars for up to 4.